Metal-working machine.



G.A.scH|PPER.. METAL WORKING MACHINE.

APPLICATION FILED NOV- 20,"I9I3..

q/Uibneoow G. A.- SCHIPPER.

METAL wonKlNG MACHINE.

APPLICATION FILED NOV. 20, I9l3.

1,200,395. Patented 0t.'3,1916.

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G. A. SCHIPPER.

METAL WORKING MACHINE.

APPucATIoN FILED Nov.'2o. |913.

Patented 0G15. 3, 1916.

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G. A. SCHIPPER.

METAL WORKING MACHINE.

APPLICATION FILED NOV- 20 1913. I 192001595. v Patented Oct. 3,1916.

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GEORGE A. SCHIPPER, OF AURORA, INDIANA, ASSIGNOR OF ONE-HALF TO GEORGEIVI. STEDMAN, OF AURORA, INDIANA.

METAL-WORKING MACHINE.

Application led November 20, 1913.

To all whom t may concern.'

Be it known that I, GEORGE A. SCHIPPER, a citizen ofthe United States,residing at Aurora, in the county of Dearborn, State of Indiana, haveinvented certain new and useful Improvements in Metal-VVorking Machines;and I do hereby declare the following to be a full, clear, and exactdescription of the'invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This'invention relates to metal working machines and particularly to amachine for shaping spur gears, beveled gears,l internal gears, cams,ratchets, sprockets, broaching and which may be also utilized for camgrinding.

The object of the invention resides, broadly speaking, in the productionof a metal working machine of the type named which is capable of turningout a large output of work and of producing many dien ent kinds of work.

A further object of the invention resides in the provision of a metalworking machine of the character named which employs cutters carried bya reciprocating ram for operating upon the work and which embodiesimproved structure and mechanism whereby one of the cutters willoperatively engage the work during each stroke of the ram.

A still further object of the invention resides in the provision of ametal working machine of the character named of such construction andoperation as'to enable the use of straight cutters without clearancegrinding, and which will permit such cutters to be sharpened while onthe machine.

Another object of the invention resides in the provision of a metalworking machine of the character named which will be simple inconstruction and which will require com` paratively little attention tokeep same in proper working order.

Vith the above and other objects in view the invention consists lin thedetails of con-- struction and in the arrangement and combination ofparts to be hereinafter more fully described and particularly pointedout in the appended claims.

In describing the invention in detail reference will be had to theaccompanying drawings wherein like characters of refer- Specicaton ofLetters Patent.

Patented Oct. 3, 1916.

Serial No. 802,126.

ence denote corresponding parts in the several views, and in which-Figure 1 is a front elevation of a machine constructed in accordancewith the invention; Fig. 2, a side view thereof; Fig. 3, a plan View ofthe invention; Fig. 4, a partial section on the line 4+4 of Fig. 3; Fig.5, an enlarged section on the line 5 5 of Fig. 1; Fig. 6, a section onthe line 6-6 of Fig. 4; Fig. 7, a transverse section through one of thecutters and its holder and also through the ram and ram retainer; Fig.8, a section on the line 8-8 of Fig. 1; Fig. 9, an elevation of theindexing mechanism which automatically controls the feeding of the workto the cutters, the parts of the mechanism being in the position theywouldl occupy when the work is stationary and being operated upon by thecutters; Fig. 10, a view similar to Fig. 9 with the parts of themechanism in the position they would occupy when the work isbeingrotated to present another surface to be operated upon on the neXtstroke of the cutters; and Fig. 11, a section on-the line 11-11 of Fig.2.

Referring to the drawings the invention is shown as comprising a base 15from which rises a column 16. The upper end of the column 16 terminatesin a laterally directed portion 17 which carries at its free end abearing 18 for a purpose that will presently appear. The column 16 issubstantially U- shape in cross section and the `arms thereof areprovided at their free ends respectively with outwardly directed guideribs 19. Slidably mounted on the ribs 19' for vertical movement is acarriage 20 and a sub-carriage 21 disposed above the carriage 20. Thecarriage `2O is supported upon the upper end of a feed screw 22 whichlatter is threaded in another feed screw 23 and this last named feedscrew is in turn threaded in a stud 24 rising from the base 15. Fixed onthe feed screw 22 is a beveled gear 25 which meshes witha beveled gear26 lixed on a shaft 27, the latter being rotatably mounted in suitablebearings depending from the base of the carriage 20. Secured against oneside of the carriage 20 is a bracket 28 in which is rotatably mounted ashaft/29 one end of which terminates in a crank 30, while the other endthereof has fixed thereon a beveled gear 31 which meshes with a beveledgear 32 fixed on the adjacent end of the shaft 27. Formed on thecarriage 2O are alined journal bearings 33 in which is` rotatablymounted a shaft 34. One end of this shaft 34 terminates substantially atythe center of the carriage and has fixed thereon a double cam 35 for apurpose thatv will presently appear. The other end of the shaft 34extends beyond the side of the carriage remote from the bracket 28 andhas fixed thereon a worm wheel 36. The subcarriage 21 is providedcentrally with spaced ears 37 between which is rotatably mounted aroller 38 having its periphery in engage` ment with the periphery of thecam 35. By this construction it will be apparent that upon each rotationof the shaft 34 the cam 35 will coperate twice with the roller 38 toeffect a predetermined elevation of the sub carriage 21.

Supported upon the sub-carriage 21 is a ram retainer 39 which isprovided at one end with depending ears 40 and 41. The ear 40 is pivotedupon a tubular member 42 secured to'and projecting through the frontside of the sub-carriage 21, while the ear 41 is pivoted to a stub shaft43 carried by and projecting inwardly from the inner side of thesub-carriage. From this construction it will be obvious that Vthe ramretainer 35 can be moved into different angular relations with respectto the sub-carriage 21. In order to secure the ram retainer 35 indesired angular relation to the sub-carriage 21 there is attached to thelower. side of the ram retainer a depending arcuate plate 44 providedwith an arcuate slot 45 and having teeth 46 formed on the edge thereofre mote from the ears 40 and 41. This plate 44 extends .across the outerside of the subcarriage 21, which latter carries a threaded stud 47projecting through the slot 45 and having engaged thereon a nut 48.Rotatably mounted in the outer side of the subcarriage 21 is a stubshaft 49, said stub shaft being disposed adjacenty the teeth 46 andhaving fixed thereon a pinion 50 meshing with the teeth 46. The shaft 49carries an operating handle 51 for convenience in effecting the rotationthereof. By this construction it will be apparent that upon rotating'theshaft 49 in one direction the end 41. During the operation of themachine the ram 52 is adapted to be reciprocated upon the ram retainer39 through the instrumentality of the following structure. Rotatablymounted in the tubular member 42 is a tubular member 54 which has keyedon the inner end thereof a gear 55. Formed on the side of the gear 55remote from the front side of the sub-carriage 21 are parallel guideribs 56 between which is slidably mounted a block 57 provided with astud 58. Engaged through the block 57 and extending parallel to theguide ribs 56 is a screw 58 one end of which is rotatably mounted in alug 59 formed on the adjacent side of the gear 55. Fixed on the screw 58between the lug 59 and block 57 is a beveled gear 60 which meshes with abeveled gear 61 fixed on a shaft 62 rotatably mounted in the tubularmember 54. The end of the shaft 62 remote from the gear 61 is exf tendedbeyond the corresponding end of the tubular member 54 and has threadedthereon a lock nut 63 whereby said shaft 62 can be secured againstrotation relatively to the tubularmember 54. Pivotally mounted on thestud 58 is one end of a link 64 and the other end of this link ispivotally mounted between the ears 53 which depend from the ram 52.Journaled in the front side of the sub-carriage 21 and in a bearing 65formed integral with the adjacent end wall of the sub-carriage is ashaft 66 which has fixed thereon a pinion 67 in mesh with the gear 55.The end of the shaft 66 remote from the gear 55 has fixed thereon abeveled gear 68 which meshes with ya beveled gear 69 fixed on a verticalshaft 70 rotatable in a bearing 71 carried by the stub shaft 43 and alsorotatable in the bearing 72 carried .at the upper end of the column 16and in a bearing 73 carried at the lower end of said column. Rotatablymounted in bearings 74 and 75 secured to the column 16 and the base 15is a drive shaft 76 which is disposed at right angles to the shaft 70and has fixed thereon a beveled gear 77 which meshes with a beveled gear78 fixed on the lower end of the shaft 70. Fixed on the shaft 76 betweenthe bearings 74 `and 75 is a step pulley 79 whereby said shaft may beconnected c eccentrically to the gear 65 through the medium of the block57 it will be apparent that the rotation of the lgear 65 will effect areciprocation of the ram 52. The length of the stroke of the ram 52 canbe easily varied by moving the block 57 toward or away from the centerof the gear 55. This is accomplished by loosening the nut 63 and thenrotatingthe shaft 62 in a desired direction. rlhis rotation of the shaft62 will be transmitted by the gears 61 and 60 to the screw 58 and therotation of this screw 58 will i effect the desired movement of theblock 57.

The ram 52 directly supports the cutting tools of the machine and thetools supported by said ram in this instance are cutters for shapingspur gears. In order to utilize both strokes of the ram in effecting thecutting operation two tools are mounted upon the ram each of whichincludes a cutter and the cutters of these tools are disposed inopposition to each other as will hereinafter appear. The tools mountedupon the ram 52 are indicated generally at A and B and each comprises abase formed of upper and lower sections 80 and 81 respectively, thesection 80 being provided with a transverse rib 82 on its lower sideengaging in a transverse groove 83 in the upper side of the section 81.The sections 80 and 81 are provided at each end with ears 84 disposed insuperimposed relation and passing through each pair of these ears is abolt 85 having a squared head 86 engaged in a longitudinal groove 87formed in the upper side of the ram 52. The upper ends of the bolts 85have engaged thereon nuts through the instrumentality of which thesections 80 and 81 are locked to the ram in any desired longitudinaladjustment with respect to said ram. Each of the tools A and B furtherincludes a cutter carrier 88 provided at one end with a depending ear 89pivotally mounted in a recess 90 formed in the upper side of the section80. The pivotal mounting of the cutter carrier 88 is such that when theend of the carrier remote from the ear 89 is seated upon the section 80the upper side of the carrier will be inclined with respect to both thesection 80 and the ram 52.

Formed in the upper side of each carrier 88 is a dove-tailedlongitudinal groove 91 in which is engaged a cutter 92 held againstlongitudinal movement in said groove by means of a wedge bolt 93extending transversely through the carrier 88. It will be noted that theholders A and B are applied to the ram 52 so as to dispose the ends ofthe carriers 88 which are pivoted to respective sections 80 in adjacentrelation with the upper sides of the carriers of respective holders andthe cutters carried by said carriers inclined downwardly toward oppositeends of the ram 52 respectively. By thus disposing the cutters 92 inopposite inclined relation the necessity of grinding said cutters forclearance is entirely obviated and the strength and life of the cuttermaterially enhanced while at the same time it is easy and convenient tosharpen the cutters while mounted upon the machine. Each of the cutters92 when mounted in operative position upon the carrier 88 has thecutting end thereof extended beyond the end of the carrier adjacent theear 89, so that during the non-cutting stroke of the cutter theengagement of the latter with the work will swing the carrier 88 on itspivot and permit free movement of the cutter without injury to eitherthe latter or the work. It will be noted that by this arrangement ofcutters one will be pai-taking of its cutting stroke while the other ispartaking of its non-cutting stroke so that a cutting operation iseffected during each stroke of the ram.

Mounted in the bearing 18 is a rotatable tubular member 94 the bore ofwhich comprises a tapering portion 95 and a cylindrical portion 96.Engaged in the bore of the tubular member 94 is a work arbor 97 whichalso includes a tapering portion 98 seating in the tapering portion 95of the bore of the member 94. One end of this arbor 97 extends over thecutters 92 and ram 52 and has formed thereon adjacent the bearing 18 acollar 99 which serves as an abutment for gear blanks 100 mounted uponthe arbor and forced against said collar 99 through the medium of a nut101 threaded on the adjacent end of the arbor. In this manner the gearblanks 100 are non-rotatably supported upon the arbor in position to beoperated upon by the cutters 92 during the reciprocation of the ram 52.Loosely mounted on the arbor 97 between the bearing 18 and the collar 99is a nut 102 threaded in the adjacent end of the member 94 and bearingagainst the collar 99 at its outer end. The purpose of this nut will bepresently referred to. Fixed on the end of the arbor 97 remote from thegear blank 100 is a worm wheel 108 which is held against longitudinalmovement on the arbor by means of a nut 1 04 threaded on the adjacentend of the latter. By operating the nut 104 inwardly of the arbor itwill be obvious that the latter will be drawn longitudinally and firmlyseat the tapered portion 98 thereof in the tapered portion of the boreof the tubular member 94 thereby locking the arbor to said tubularmember for rotation with the latter. lf it is desired to diseugage thearbor from the tubular member 94 it is only necessary to lirst removethe nut 104 and then unscrew 4the nut 102, the engagement of said lastnamed nut with the collar 99 serving to effect the necessarylongitudinal movement of the arbor to withdraw same from the tubularmember 94.

After each stroke of the cutters 92 and ram 52 the arbor 97 is partiallyrotated so as to present another portion of the gear blanks 100 to beoperated upon by a cutter during the next stroke of the ram. Themechanism for accomplishing this rotation of the arbor and gear blankswill be broadly termed the indexing mechanism and comprises a. casing105 secured against theside of the column 16 adjacent the worm wheel 36and at a. point above said worm wheel. Rotatably mounted in the ends ofthe casing 105 is a. shaft 106 which has fixed thereon at one endexteriorly of the casing 105 a gear 107. The other end of this shaft 106extends a considerable distance beyond the adjacent Y end of the casing105 and has fixed thereon a worm 108 in mesh with the worm Wheel 103carried by the arbor 97. Journaled in the bearing in the end of thecasing 105 adjacent the gear 107 and in abearing 109 carriedby thecasing 105 is a shaft 109 and fixed on the outer end of this shaft is agear 110 connected to the vgear 107 by an idle gear 111 rotatablymounted on a stub shaft 112 carried by the adjacent end of the casing105. Rotatably mounted in the end of the casing remote from the gear 110and in a bracket 113 carried by said casing is a shaft 114 disposed inlongitudinal alinement with the shaft 109. This shaft 114 is heldagainst longitudinal movement by means of a collar 115 fixed thereon andinterposed between the bearing 113 and the adjacent end of the casing105. Fixed on the outer end of the shaft 114 exteriorly of the casing105 is a beveled gear 116 for a purpose that will presently appear.Splined on the inner end of the shaft 114 is a clutch element 117provided with teeth 118 on the inner end thereof, said teeth beingadapted to coperate with teeth 119 formed on the adjacent end of aclutch element 120 fixed on the shaft 1 09 and whereby the shafts 109and 114 may be locked together for simultaneous rotation. Splined on theshaft 109 for movement longitudinal of said shaft is a drum 121 providedwith a hub extension 122 having a circum' ferential groove 123. Pivotedon the front of the casing 105 exteriorly of the casing is a lever 124provided with a slot 125 and having its free end terminating in a handgrip 126. Formed in the front side of the casing 105 and extendingparallel to the shaft 114 is a slot 127 having the lower edge thereofprovided with a series of equidistantly spaced recesses 128. Extendingthrough the slot 125 andthe slot 127 is a rod 129 the outer end of whichis provided with a head 130 and the inner end with a yoke embodyingfingers 131 which are engaged in the groove 1 23 of the hub 122. Byelevating the rod 129 out of a recess 128 and then swinging the lever124 on its pivot it will be apparent that the drum 121 will bemovedlongitudinally of the shaft 129.

The periphery of the drum 121 is provided with a plurality of series ofrecesses 132, 133, 134 and 135, the recesses of each series beingdisposed in the same-plane extending transversely `through the drum. Thenumber of recesses in each series varies,

there being one recess inthe series 132, two

recesses in the series 133, three recesses in the series 134 and so on.The purposes of these recesses will presently appear.

Mounted on the inner face of the front side of the casing 105 are guideblocks 136 between which is slidably engaged a shot bolt 137. The lowerend of this bolt 137 is reduced as at 138 and this reduced end of thebolt is adapted to engage in the recesses on the drum 121 during theoperation of the indexing mechanism as willhereinafter appear. The upperend of the shot bolt 137 is reduced as at 139 and slidably engagedthrough the top of the casing 105. Threaded on the upper end of the shotbolt is a nut 140 which bears against the outer face of the upper sideof the casing 105. Surrounding the reduced upper end 139 of the shotbolt is a spring 141 one end of which bears against the top of thecasing 105 while the other end thereof bears against the upper end ofthe major portion of the shot bolt. This spring 141 constantly tends toforce the lower end of the shot bolt against the periphery of the drum121 as will be obvious. Pivotally supported from the rear side of thecasing 105 is a two armed lever 142 one end of which passes through anopening 143 in the end of the casing 105 adjacent the beveled gear 116and has journaled thereon a roller 144, while the other end of saidlever is forked as at 145 and receives a pin 146 projecting from theshot bolt 137 and whereby sliding movement of the shot bolt will producepivotal movement of the lever 142. Depending from the lever 142 is anarm 147 which terminates in a forked portion the arms 147 of which areengaged around the clutch member 117 and in a groove 148 formed in saidclutch member. By this construction it will be apparent that pivotalmovement of the lever 142 will serve to connect and disconnect` theshaft 114 to and from the shaft 109.

Projecting from the end of the casing 105 on opposite sides of theopening 143 respectively are brackets 149 and journaled in thesebrackets at right angles to the shafts 106 and 114 is a shaft 150. Fixedon this shaft 150 is a worm wheel 151 and also fixed upon the shaft 150above the roller 144 is a cam 152 which is adapted to coperate with ytheroller 144 upon each complete revolution of the shaft 150 to depress theadjacent end of the lever 142 and connect the clutch elements 117 and120. Mounted on the upper end of the column 16 is a bearing 153 whichalines with bearings 154 and 155 on the carriage 20'and also with abearing 156 on the base 15. Rotatably mounted in the bearings 153, 154,155 and 1,56 is a shaft 157 which has fixed on the upper end thereof astep pulley 158 adapted for connection through the medium of a belt witha step pulley 159 fixed on the upper end of the the shaft 157 is a worm161 which meshes with the worm wheel 151 carried by the shaft 150. Alsoixed on theshaft 157 just beneath the worm 161 is a beveled gear 162which meshes with the beveled gear 116 for the purpose of impartingrota-tion to the shaft 114 through the medium of rotation of the shaft157.

During the operation of the machine it will be apparent that the shaftsand 157 are constantly rotated and that the rotation of the shaft 70will be imparted to the shaft 66 through the medium of the gears 68 and69. This rotation of the shaft 66 will in turn rotate the ear 55 throughthe medium of the pinion 6 As a result of the rotation of the gear 55the ram 52 and the cutters 92 carried thereby will be reciprocatedbeneath the gear blanks 100. The rotation of the shaft 157 will, throughthe medium of the worm 160 and the worm wheel 36, rotate the shaft 34and the cam 35 and this cam coperating with the roller 38 will elevatethe sub-carriage 21, ram retainer 39, ram 52 and cutters 92 twice duringeach rotation of the shaft 34 to a-position to dispose the cutters 92 incutting position with respect to the blanks 100, the complete elevationof the parts referred to occurring just before the active cutter 92moves into engagement with the work. As soon as a given cutter hascompleted its cutting stroke lowering of the parts is permitted by thecam 35 so as to allow of the operation of the indexing mechanism for thepurpose of turning the work to present a new surface to be cut. Theextent of the elevation of the cutters 92, or rather the cuttingposition thereof is of course effected by rotating the elevating screws22 and 23 through the medium of the crank 30 as has been hereinabovereferred to. The rotation of the shaft 157 will also rotate the shaft114 through the medium of beveled gears 162 and 116, and also the shaft150 through the medium of the worm 161 and the worm wheel 151. Theconnections between the shaft 157 and shaft 150 are so timed that when agiven cutter 92 has completed its cutting stroke the cam 152 will engagethe roller 144 and depress the adjacent end of the lever 142 thusraising the lower end 138 of the shot bolt out of one of the recesses134 and at the same time connecting the clutch members 117 and 120. Theshaft 109 and the drum 121 will then rotate until the next recess 134 ispositioned to receive the lower end of the shot bolt, at which-time thecam 152 is out of engagement with the roller 144 so that the spring 141is free to act and force the lower end of the shot bolt into the recess.This movement of the shot bolt will of course disengage the clutchmembers 117 and 120 and terminate the rotation of the shaft 109. Thisoperation is repeated during each complete revolution of the shaft 150.During the operation of the shaft 109 it will be obvious that the shaft106 will be rotated through the medium of the gears 110, 111 and 107.The rotation of the shaft 106 will rotate the arbor 98 through the me-Vdium of the worm 108 and worm wheel 103 and this rotation of the arborwill rotate the blanks 100 to present another portion of said blanks tobe subjected to the next cutting stroke of the cutters 92. The variousparts of the machine are so timed that the operations heretoforereferred to will be performed in proper sequence.

If it is desired to shape cams it is only necessary to screw the nut 140on the shot bolt 139 and thus raise the lower end of the shot bolt outof recess in the drum 121 and lock the shafts 114 and 109 together sothat the arbor 98 and the work carried thereby will turn continuously.Tf it is desired to cut beveled gears it is only necessary to adjust theram retainer 39 at an angle to the sub-carriage 21 in a mannerpreviously referred to.

The amount of rotation imparted to the blanks 100 can of course bevaried by adjusting the drum 121 to bring desired series of recessesinto operative relation to the shot bolt.

What is claimed is:-

1. In a gear cutting machinefa vertically slidable carriage, a secondcarriage slidably mounted in relation to the carriage and supported bythe latter, a cutting tool support mounted to reciprocate upon saidsecond carriage, means for adjusting the carriage to differentelevations, and a rotatable member journaled upon said carriagecoperating with said secondcarriage for translating said carriage inalternate directions.

2. In a gear cutting machine, the combination of a vertically slidablecarriage, a sub-carriage slidably mounted above the carriage andsupported by the latter, means for adjusting the carriage to differentelevations, a rotatable shaft carried by the carriage, a cam lixedonsaid shaft, a roller journaled on the sub-carriage and engaging said camwhereby the rotation of the latter will intermittently raise thesub-carriage a predetermined distance, a cutting device mounted forreciprocation on the sub-carriage, means for reciprocating said cuttingdevice when the subecarriage is elevated, a work arbor, and means forrotating said work arbor after each stroke of the cutting device todispose another portion of the work in position to be operated upon bythe cutting device on its next stroke.

3. In a gear cutting machine, a Work supporting arbor, a verticallyslidable carriage translatable to adjust the same to differentelevations, a second carriage slidable in relation to the carriage, anda rotatable cam member journaled upon said carriage Cooperating withsaid second carriage to move the latter toward the arbor and controllingsaid second carriage moving under the influence of gravity in a reversemotion.

4. In a machine of the class described, a vertically slidable carriagetranslatable to adjust the same to diierent elevations, a rotatable cammember journaled upon said Carriage, a second carriage slidable in rela-15 in an alternate direction controllably by said 20 cam member.

In testimony whereof, I afiix my signature, 1n the presence of tivoWitnesses.

GEGRGE A. SCHIPPER.

Witnesses:

IVILLARD M. DEAN, JESSE L. MoELRoY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

